Amateur radio (also called ham radio) describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.

Magazines

http://www.dxzone.com/catalog/Publications/Magazines/

My beautiful Tube testers
After long time i deside to pick up from my basement sorage my Tubetesters .
So i have to make some cleaning and restoration on them .
until then have some view of them.
I have to make some changes on old caps and resistors as well on soldered components.
Enjoy them.
One British one French and two from the States. There is no manual from AVO.